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| Ultra Small, High Accuracy Sensors Target Medical Wearables
Maxim Integrated Products has announced a pair of sensors. The MAX30208 is a clinical-grade digital temperature sensor that enables new wearable health and fitness use cases at half the power. And the MAXM86161 Is an in-ear heart-rate monitor provides best-in-class SNR at lowest power and 40% less space for continuous heart-rate and SpO2 measurements, according to Maxim. To provide value, wearable health and fitness monitors require greater accuracy in measuring human biometrics such as body temperature and heart rate, but device designers have been limited by sensor accuracy for small, battery-powered, body-worn devices. Maxim's two new continuous-monitoring body sensors provide higher degrees of accuracy in measuring vital signs such as temperature, heart rate and blood-oxygen saturation (SpO2).
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Avoid Reinventing the Wheel on Industrial Designs
Software updates are easy to roll out, but hardware upgrades on custom designs often require a major investment of time and money. A modular approach can speed up this process. In this article, congatec's Dan Demers explains how.
READ THE ARTICLE HERE
650 W Medical AC-DC Power Supplies Feature BF Class Insulation
XP Power has announced two new ranges of AC-DC power supplies that provide BF class insulation for healthcare applications where excellent EMC performance is a key requirement. The PBR500 and PBR650 series offer power levels up to 500 W and 650 W respectively. Both series accept a very wide, universal input range of 80 VAC-264 VAC at 47 Hz to 63 Hz and offer a total of eight single output voltages, giving system designers the flexibility to cover many applications with the same series. Both series offer efficiencies of 90%, reducing the heat generated during operation and prolonging the lifetime. The PBR500 is available in two formats. The U channel format provides 350 W to 400 W when convection cooled and 450 W to 500 W with external forced air cooling. The covered version, including a variable speed integral cooling fan for low audible noise, provides a complete 450 W to 500 W solution. The PBR650 provides 600 W to 650 W in an enclosed supply also with a variable speed integral fan with low audible noise.
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Drive World Launches in Silicon Valley
Aug 27-29, Santa Clara Convention Center
This summer, Drive World Conference & Expo launches in Silicon Valley with North America's largest embedded systems event, Embedded Systems Conference (ESC). The inaugural three-day showcase brings together the brightest minds across the automotive electronics and embedded systems industries who are looking to shape the technology of tomorrow. Drive World is a must-attend event for electrical and mechanical engineers looking to grow in the automotive intelligence and advanced mobility industries. Combined with ESC, which celebrates 30 years in 2019, the two-in-one event will provide attendees with industry-critical education in the heart of electronics innovation: Silicon Valley!
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80 V DC-DC Buck LED Driver IC Enables High Dimming Performance
Infineon Technologies has introduced an LED driver IC, the ILD8150/E, that features an innovative hybrid dimming mode technology for achieving 0.5% of the target current. With its supply voltage range from 8 VDC up to 80 VDC, the driver IC provides a high safety voltage margin for applications operating close to safe extra-low voltage (SELV) limits. The driver IC is well suited for general and professional LED lighting applications with high dimming requirements.  The ILD8150/E offers a deep dimming performance without flicker and prevents audible noise. A PWM input signal between 250 Hz and 20 kHz controls the LED current in analog dimming output mode from 100 to 12.5% and from 12.5% to 0.5% in hybrid dimming mode, with a flicker-free modulation frequency of 3.4 kHz. The digital PWM dimming detection with high resolution and the low power shutdown perfectly match the ILD8150/E to microcontrollers. The device also has a dim-to-off function and a pull-down transistor to avoid LED glowing in dim-to-off mode.
NEW PRIZE: Win a Free 2018 Circuit Cellar Digital Archive! This week's newsletter raffle is for a 2018 Digital Archive of Circuit Cellar magazine. Enter the drawing using the link below. The archive gives you access to view the twelve 2018 issues of Circuit Cellar. Your archive can be viewed in an online flip book or you can download the PDF copies. A $40 value! Drawing ends at midnight this coming Friday.
And congratulations to last week's raffle winner, Jason J., who won a 1 year subscription to Circuit Cellar. Thanks to all who participated! |
Submit Your Technical Article to Circuit Cellar Magazine
 Circuit Cellar magazine is always looking for top-notch technical articles that help readers better understand embedded electronics technology in action. Professional engineers, academics, students and serious electronics enthusiasts are encouraged to submit articles and proposals. Whether its a project-based article, an article about a technology trend, or an analysis of a technical issue or challenge, Circuit Cellar is looking for insightful, detailed articles that help its readers do their jobs as embedded system designers. If you have an article or an article proposal, let us know! Our article submissions page provides you with our requirements and guidelines. Switching Regular's Low Quiescent Current Extends Battery Life
Texas Instruments has introduced an ultra-low-power switching regulator with what TI claims is the industry's lowest operating quiescent current (IQ) at 60 nA, a third that of the nearest competitive device. The TPS62840 synchronous step-down converter delivers very high light-load efficiency of 80% at 1 µA load, which can enable designers to extend the battery life of their systems, or use fewer or smaller batteries to shrink their overall power supply solution size and reduce cost. Additionally, the  new DC/DC converter's wide input voltage (VIN) range of 1.8 V to 6.5 V supports a variety of battery chemistries and configurations.
These features plus its selectable functions enable the TPS62840 to help engineers solve critical design challenges in many battery-powered, always-on industrial and personal electronics application ---including narrow-band Internet of Things (IoT), grid infrastructure equipment and wearables---that require more flexibility, an extended wireless range, improved accuracy and reduced electromagnetic interference (EMI). DC-DC Converters Provide High Isolation for Energy Systems MINMAX has announced the MJA06C and MKA10C series, the company's latest range of 6-10 W DC-DC converters for MINMAX's ultra-high isolation power solutions. They have a chassis and DIN-Rail mounting package which can be directly installed in a server rack, data cabinet, and outdoor telecom/industry equipment. The input voltage range 80-190 VDC makes it suitable for use in energy systems. 
The MJA06C (shown) and MKA10C Series both consists of 9 models offering 80-160 VDC input ranges with single output models ranging 5-48 VDC and dual output models ±12 V, ±15 V, ±24 V delivering 6-10 W of output power. Further features include I/O Isolation of 3000 VAC, high average efficiency up to 85%, operating ambient temperature range of -40°C to +92.5°C, no minimum load requirement, built-in EMC filter for EMI emission EN55032 Class A without additional components required, and under-voltage/overload/short-circuit protection. All models have been qualified per the CB scheme with safety approvals to UL/cUL/IEC/EN 62368-1 standards.
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